For the first time, they used a computer program to map the downtown party scene to scale so everyone and everything will be in its proper place.

Abraham and his committee of volunteers are the people who make sure there's enough police protection, the streets are cleaned before and after the event and people have a place to park and go to the bathroom.

They also take care of the entertainers.

"That's just for Saturday, and we do it all again Sunday," Disque said.

The City Park concert on Sunday is easier to set up because of its location and free admission.

But there's always one element or risk that organizers face - the weather.

In past years, organizers have mostly had the good fortune of sunshine and warm temperatures. No day has been a total washout.

But it's a risk they take every year, and one they know will affect attendance and the bottom line.

Early this week, they will scan weather forecasts and decide if they need to buy insurance against lost ticket sales. The rest, despite all their detailed planning, will be out of their control.